Lots of tape drives from that era could do that. You've got big heavy motors and spindles, which means lots of inertia. Tell a drive to spin up to full speed, then abruptly stop, and you got lots of angular momentum that still needs to be dissipated. As the spindle assembly is anchored to the chassis, this ends up getting dissipated through the chassis as a quick movement. Spool up the spindles in the opposite directiion and then abruptly stop, and you've just made it step forward. Repeat many times and you've got a walking disk drive.